.\"	$OpenBSD: fold.1,v 1.16 2011/12/28 22:27:18 schwarze Exp $
.\"	$NetBSD: fold.1,v 1.5 1995/09/01 01:42:42 jtc Exp $
.\"
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.\"	@(#)fold.1	8.1 (Berkeley) 6/6/93
.\"
.Dd $Mdocdate: December 28 2011 $
.Dt FOLD 1
.Os
.Sh NAME
.Nm fold
.Nd fold long lines for finite width output device
.Sh SYNOPSIS
.Nm fold
.Op Fl bs
.Op Fl w Ar width
.Op Ar
.Sh DESCRIPTION
.Nm
is a filter which folds the contents of the specified files,
or the standard input if no files are specified,
breaking the lines to have a maximum of 80 characters.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl b
Count
.Ar width
in bytes rather than column positions.
.It Fl s
Fold line after the last blank character within the first
.Ar width
column positions (or bytes).
.It Fl w Ar width
Specifies a line width to use instead of the default 80 characters.
.El
.Sh EXIT STATUS
.Ex -std fold
.Sh SEE ALSO
.Xr expand 1
.Sh STANDARDS
The
.Nm
utility is compliant with the
.St -p1003.1-2008
specification.
.Sh HISTORY
The
.Nm
utility first appeared in
.Bx 1 .
It was rewritten for
.Bx 4.3 Reno
to improve speed and modernize style.
The
.Fl b
and
.Fl s
options were added to
.Nx 1.0
for
.St -p1003.2
compliance.
.Sh AUTHORS
.An -nosplit
.An Bill Joy
wrote the original version of
.Nm
on June 28, 1977.
.An Kevin Ruddy
rewrote the command in 1990, and
.An J. T. Conklin
added the missing options in 1993.
.Sh BUGS
If underlining (see
.Xr ul 1 )
is present it may be messed up by folding.
.Pp
.Ar width
should be a multiple of 8 if tabs are present, or the tabs should
be expanded using
.Xr expand 1
before using
.Nm fold .
